When the main power goes out before the data write to the cache is completed, it can be lost. The batteries can be smart cache, capacitors, or lithium-ion batteries. Why Do RAID Controllers Need Batteries?Īny RAID Controller should have a battery to avoid data loss when there is a power outage on the mainline. RAID controllers virtualize the storage drives into different groups that possess both data protection and redundancy features. As the name suggests, RAID provides redundancy and improves the performance of disk storage devices. RAID is a short form for Redundant Array Independent Disk that sits between the operating system and data storage devices. This product may have minor blemishes due to normal product usage and doesn't necessarily come with documentation and software unless indicated, but has been well tested and generally has never had any defects.Ĭomputer servers have RAID controllers. Refurbished products are typically refurbished by an Original Manufacturer or an affiliate of the manufacturer or 3rd party facility.
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